The 18 college students in Fudan University should           show their greatest respect to their hero — Zhang Ninghai instead of being cold and unfeeling.

The bank refused to give the company more time, and ________, it broke down.

When we think of communication , we _________ think of using words---- talking face to face, writing messages, and so on .

The incomes of skilled workers went up. ____, unskilled workers saw their earnings fall.

Traffic is bad, ______ in the city center during the rush hours.